If you still have an hour....
If you can pop it, do so, but with out a needle. Basically, push your skin together and if stuff comes out, good, if it hurts, stop.
After this, regardless of if it worked or not, use a cotton swab or q-tip and put rubbing alcohol on it. Hold it there for a few minutes. It should burn. It will dry out the area pretty bad and it may look more red immediately after.
Then use clear eyes on it or any other generic eye drop you happen to have. The area should be dry from the alcohol, so it should soak in. Let that happen.
If in half an hour, the redness hasn't gone down at all, grab moms/sister compact. get some lotion on the tip of your finger, just so it feels oily, then touch the compact once with your finger. Apply to the area and rub it in a bit. You just need to make sure you remove it after they leave, cause regular lotion on the face = bad. With the lotion it will look a lot more natural than trying to use concealer.